Reaming machine



S. B. CLAY.

REAMING MACHINE.

APPLICATION FILED AUG.30| 1920.-

Patented Feb. 28, 1922.

cylindrical tubular "ob tooLA radially withrlationjt UNITED lSTfVIES PATENT GFFILCE.

SAMUEL IB. CLAY, OF LST. LOUIS, MISSOURI ASSIGNOR vTO HEINE SAFETY BOIL'ER COME-ANY., V0F ST. LOUIS, MISSOURI, A CORPORATION OF kMISSOURI.

REAMING MACHINE.

Application filed August 30, 1920.

17 70 all 'to/wm z'zf may concern.' Y

Beit known that 1I, SAMUEL B. CLAY, a citizen lof the United States, residing'at St. Louis, Missouri, have invented a certain new and useful Improvement in Reaming Machines,ot-which the following is a full, clear, and `exact description, such as will enable others skilledsin the art Itoxvvhich it appertains -to make-and use Athe same.

This invention ,relates to boring kor ream` ing machines, and has for its main object to provide an efficient machine capable ot'being arranged 4on rthe inside `of a boiler shell or other cylindrical tubular Vobject and constructed in such a manner that it will `hold the cutting` toolsteady and radial with respect to kthe shelll and force lsaid tool outwardly through the shell.

Anotherobject is -to provide an internal reaniingor boring machine inwliichthe cutting tool can be easily moved longitudinally oi' the :object inside V,of which the machine is arranged Yand also revolved 4or Vswung about the longitudinal axis of. said objectgso as to position said tool at` anydesired point on the inner surface `oi? said object. And still another object is to ,provide ka supporting mechanism for power-operated reamerthat makes it *possible for a single `workman located inside ota boiler shell toA accurately ream holes in'theshell.

lOther objects andy Adesirable 'features Vof myl invention lwill y be 'hereinafter pointed out.

, Figure '-1 of the drawings is a front elevational view ,of the supporting structurek yof my improved `machine with `rtheair motor and the -operating `.cylinder for'said motor removedg'and Y Figure is a sidey elevational view 'of the completemachinev n y i Briefly described,;my invention consists of a rotatable cutting! tool fA, suchi'orv example, as a ydrill :or ireamer, a means l"for rotating "said `tool, herein shown j'as jan air Amotor B or other suitable 'motoig jangadjustablejsupporting'structure *for said-j motor ,adapted to be arranged Linside `of a boiler is'hell for lother ject AAAfor "holding the theimrerA S111* faceofrithefshllifalfdfefeynder;provided with :a piston gior "bodily -inoving the motor B `so 4asitoifeed theftool A through the `work andwithdrawisaid tool -vfrom the work. The

`supportingfstructure that carries the moi Specification of Letters Patent.

Patented Feb. 28, 1922. Serial No. 406,786.

tor B and the cylinder C is constructed in such'a manner that the tool A can lue-shifted longitudinally of the shell inside of which the machine is arranged and also revolved or swung about'the longitudinal axis or' the shell. Said supporting structure .is also designed so that it can be adjusted easily to adapt it to boiler shells or cylindrical tubular objects of different diameters. The supporting structure above referred to preferably consists or' a shaft D Iarranged longitudinally of and at the center oi the boiler shell or other tubular object m inside of which the machine is arranged, a tubular bearing 'E partly broken away ,in Figure 2, 1n Awhich the shaft D is mounted in such a manner that it can be revolved and also moved longitudinally of said hearing, a frame or "head piece F onione end of'said shaft D which is yprovided with a bracket l that `carries the cylinder C, and a sliding block or support 'la in the yframe F `to which themotor B is rigidly connected. Theshait bearing E is .provided .with means that holds said bearing E(stationary.and centered with` relation to the shell or object on .which the tool A of the machine'operates, and while said means vcan be constructed yin various ways without departing from the spirit of my invention, I prefer to providethe shai't bearing E with twosets of radi ally-disposed arms,rrigidly connectedto saidbearing and having'their outer ends bearingagainstthe inner side of the shell The arms that support and center `the shaftbearing ,E are preferably .constructed in suchV a manner be retained in positionby bolts that "pass, .through aligned l holes I, in Vthe ,Q tubular mein bers "2 01? the arms and in the ,adjustable extensionsin -saidinembers Qian'd the-,adjustable extensions of the other arms of the set can' be externally screw-threaded and mountbear against the innery sideof the. shell., The adjustable..eXteniSiQnSy SSO ed in nuts or internally screw-tln'eailed dcvices in the tubular members 2 that carry said extensions, as shown in Figure 2.

An operating medium, such as air under pressure, is supplied to the cylinder C through a flexible tube 5, and the admission and exhaust of said operating medium to and from said cylinder is controlled by a valve Gr whose stem is provided with a handle G. To position the tool A at any desider point on the interior of the shell ai it is only necessary for the operator to shift the shaft D longitudinally of its supporting bearing E so as to arrange the tool in a vertical plane passing through the point where the tool is to act on the shell, and then revolve the shaft l) so as to bring the tool directly opposite said point.- `lhereafter the operator moves the handle 6 of the controlling valve so as to admit the operating medium to the cylinder C, and thus cause the motor B to move outwardly towards the shell.

The motor B is set in operation by manipulating the handle 7 of the valve which controls the supply of operating medium to said motor, and during the cutting operation the tool A is forced outwardly through the shell by the outward pressure which the piston of the cylinder C exerts on the motor B. At the completion of the cutting operation the operator moves the handle y6 of the controlling valve in the opposite direction so as to cause the motor B to move inwardly towards the center of the shell and thus withdraw the tool A from the work.

wWith a machine of the construction above described it is possible for a single workman located inside of a boiler shell to accurately ream holes in the shell, dueto the fact that the tool A of the machine is supported in such a manner that it will be held steady and radially disposed with respect to the shell during the cutting operation, and.

it can be moved easily longitudinally of the shell and also revolved about the longitudinal axis of the shell, so as to arrange the tool at any desired point on the inner surface of the shell.

In the actual operation of the machine the supporting structure which carries the shaft D is arranged adjacent one end of the shell., and after the holes inthe end section of the shell have been roamed said supporting structure is released and movedlongitudinally further into the shell so as to bring the tool A within rangel of the holes in theV next sect-ion of the shell.v p

Having thus described my invention, `what I claim as new and desire to secure by Letters Patent is:

1. A boring or roaming machine, compris ing a. supporting structure adapted to be arranged transversely on the inside of a tubular object, means for clamping or connectingsaid structure to said object, a part carried by said structure that extends longitudinally of said object, said part being adapted to be shifted longitudinally and also rotated around the longitudinal axis of said object7 and aV rotatable cutting tool carried by said part and disposed radially with respect to the tubular object on which it operates. i

2. An internal boring or reaming machine, comprising a supporting structure Vadapted to be arranged transversely inside of a tubular object and secured to saine, a rotatable cutting tool disposed radially with respect to said object and adapted to be forced outwardly through said object, and means cooperating with said supporting structure for carrying said tool yand for permitting said tool to be shifted longitudinally of said object, transversely of said object, and also revolved bodily about the longitudinal axis of said object.

n 3. An internal boring or reaming machine comprising a removable supporting structure adapted tobe arranged inside of a tubular object, a rotatable cutting tool adapted to be forced outwardly through said object, transversely of saidy object, means for detachably connecting said structure to said object, and a supporting means for said tool movably `mounted on said supporting structure in such a ,manner that said supporting means and tool can be shifted longitudinally of said object. y

4.-. An internal boring or rea-ming machine comprising a rotatable cuttingtool adapted tobe arranged inside of a tubular `object and forced outwardly through same during the cutting operation, and means arranged inside of said object and detachably connected to same for supporting said tool and permitting saidtool to be bodily shifted longitudinally of saidobject'and also revolved about the longitudinal axis of said object Without changing the lposition of said supporting means. il f 5. An internal boring or roaming machine comprising afsupporting structure adapted to be arranged transversely inside of a tubu-V lar object, means for detachably connecting said structure to said object, a shaft mounted in said structure at the center of said object and arranged at right angles to said structure7 said shaft being capable: of being revolved and also shifted longitudinally of the object, a means carried by said shaft for operating a cutting tool, and a means for bodily shifting said tool operating meansv so as to carry. the tool into and out of engagement Vwith the (work.

6. An internal boring or reamlng machine comprising a supporting structure adapted to be arranged transversely inside of a tubu-v larobject and detachably connected to same, a shaft carried by said supporting structure andarranged longitudinally of said object, said shaft being capable of being rotated and also shifted longitudinally, a head piece on said shait, and a motor support Inovably mounted on said head piece.

7. A supporting means for a 'power-operated drill or reamer comprising a tubular bearing adapted to be arranged inside of a tubular object, longitudinally of saine, means for holding said bearing centered with relation to said object, a longitudinally shiftable shaft rotatably mounted in said bearing, a part connected to one end of said shaft and provided with a cylinder equipped with a piston, and a radially movable tool on said part adapted to be actuated by the piston of said cylinder.

8. An internal boring or reaming machine comprising a bearing adapted to be arranged longitudinally at the center ol a tubular object, radially disposed arms projecting from said bearing and having their outer ends contacting with the object inside of Which the bearing is arranged, a longitudinally shiftable shaft rotatably mounted in said bearing, and means on one end of said shaft for carrying a power-operated tool.

9. An internal boring or roaming machine comprising a bearing adapted to be arranged i longitudinally inside of a tubular object, radially projecting arms branching from said bearing and provided with adjustable extensions for engaging the object inside of which the bearing is arranged, a longitudinally shiftable shaft rotatably mounted in said bearing, a right-angularly disposed head piece on one end of said shaft, a cylinder carried by said head piece, and a support for a power-operated tool slidably mounted on said head piece and adapted to move radially for the purpose described.

l0. An internal reaming or boring inaehine, comprising a supporting structure adapted to be arranged inside of a tubular object and composed of a sha-lit bearing, and sets of radially disposed arms that branch from said bearing, said arms having adjustable extensions provided at their outer ends with sharp pointed devices that bear against the internal surface oi. said object, a longitudinally shiftable'shaft rotatably mounted in said bearing, a head piece on one end of said shaft, a cylinder carried by said head piece, and a motor support slidably mounted in said head piece.

SAMUEL B. CLAY. 

